Bolter for carbon black, etc.



Nov. 13, 1928.

W. S. HOSKINS BOLTER FOR CARBON BLACK, 2T0

Filed Dec. 13, 1924 4 Shuts-Sheet 1 INVENTOR BOLTER FOR CARBON BLACK,ETC

Filed Dec. 13, 1924 4 Sheets-Sheet 2 INVENTOR ATTORNEY w. s. HOSKINSBOLTER FOR CARBON BLACK, ETC v Filed Dec. 13, 1924 4 Sheets-Sheet 4 IIIIII II [III III II I Illglllllllll ll ll III "III! mu u u u q "-30 a Ill II III I ll INVENTOR ATTORNEYS v Patented Nov. 13,

WILLIAM s. HOSKINS, or waaanu,

IBON COMPANY, or" WILLIAMSPOBT,

WARE.

This invention relates t carbon black to remove the sharp c wit ofgritty, hard, found incorporated PENNSYLVANIA, Assreuon 'ro COLUMBIANcan- PENNSYLVANIA, A conroim'rioiv or DELA- BOLTER FOR cannon iaLacx,ETC. j

Application filed December 1e, 1924. semi-m. 755,604.

very

5 cles of carbon black, and which 1 ly detrimental if the carbon usedfor such purposes as po bufiing compounds, etc.

Carbon black is very although very fine, it

even

through a screen,

does not 3 though 0 the bolting of small specks arbon particles often hthe minute" partiare extremeblack is to be lishing pastes,

light,. 'an d therefore readily pass the mesh of the screen is of amplesize to permit passage of the carbon black particles.

readily cake or form lumps, gritty particles often present 'It does notbut the small, therein form nuclei for small pellets. These grittyparhard, and somewhat analogous to carborundum, and have a very ticlesare extremely injurious abrasive tating reel sieves be forced over thesurface of the latter.

do not give satisfaction action: on screens if they because theultra-fine particles of carbon coat the wires and clog the tailings areexcessive causes a ba'lling action particles with fine carbon to largerthan the original sp several times of hard carbon forming or diskpellet. Circular.

because the circular tends to pile the car revolving. brushes do of thetray and away brushes moving only i spect to the screen por be of astiff material, 0 of carbon would be forme up of the holes of the m thenot give motion of the brush bon at the outer edge from the center. none direction in're-. tion of the tr'ay'must therwise a solid cake d bythe plastering esh with the fine clinging particles of carbon.

gritty particles permit the passage 0 s will :overcome the theinterstices and because the rolling by coating the gritty form pelletseck core of the haped trays with satisfaction The Therefore stifi'brushes are usually used and these have a tendency to distort the meshthrough the wire so stretched. The min hard and therefore abrasive, ofthem over the screen rapidly in thelatter and permits ,particles to passthrough. I inspection and emptying. of trays or sieves is necessa thedetection of small f gri my invention 1s and force the apertures of theute particles are and the rubbing wears holes -the larger gritty Thusthe circular 1n order to insure oles which would tty'part-icles.

continual -The brushes are mad pass the mesh thereof.

v to fting apparatus whichdifliculties above referred to in connectionwith apparatus now employed for the bolting of carbon black.

In myrlmproved apparatus I avoid. pressing action which would tend tobreakup or crush the gritty particles or force them 1 ak'up lump s butto to keep-the pascarbon black gov through. This: is accomplished bybrushes, so mounted that they moveback and forth, each over a limitedsection of the screen, and with very light pressure on the latter.

. The-movement of the brushes first in one -d1- rection and then in theother, varies the action of-the brushes on the screen so as to keep theinterstices of the latter clear. actionjof the brushes is sufficientlylight to pass over agritty particle without forcingthe latter overthesurface of the screen to give abrasive action, the particle throughthe screen. The particles may be swept along in advance of the brushwithout being pressed on to the latter.

e up of fine p rather than stiff \bristles or steel brushes which haveheretofore been employed. 7 v -I am aware that it-hasbeen proposed tousebrushesmovable back and forth over; screens for the treatment of certainmate.- rials other than carbon black, but so far as I know, thecharacter of the material treated and the nature of .thebrushes usedhave been such as tobreak up lumps and forceall of the particles throughthe screen which can hairs,

sweeping 1 action The and without forcing In the accompanying drawings Ihave illustrated an apparatus embodying my 1nvention, but it will beunderstood. thatthe details thereof are'notimportant or essential exceptin so far as they are defined in the "appendedclaims. 'It will beunderstood that, the specific apparatus shown isto be con-'. sidered-inan illustrative rather than in a limiting sense.v

--In th drawings:-

Fig. 1 is a side elevation,

the casing at 5 and 13 :s a screen pan or tray ripheral Wall 14 and areticulated bottom 15.

I theright handside being in .open position. Fig, 2 is a view of theleft hand 'end of the machine.

.Fig. 8 is a section on the line 33 of 5 Fi 1.

tion while the screens of the other are being removed and cleaned .Eachsection of the machine includes a casing having therein a screenpan ortray and a ser es of brushes 1n operative relatlonship thereto.Preferably there are two superposed screen pans or trays and a separateset of'brushes for each screen, ,so that the upper screen of coarsermesh may remove certain of the gritty particles, while the finer grittypar- 2.5 ricles may be removed by the lower screen to which the carbonblack is delivered from the upper screen. The casing is made up of aplurality of sections relatively movable,

whereby the screens and brushes maybe sep- 3H arated vertically and thescreens removed from the casing.

. As illustrated-each casing includes an up per section 10, a pair ofsuperposed intermediate casing sectionsll and 12, and a 3 lower orbottom section 13. Thesections 10 and 11 form a housing for theupper-screen and upper brush, while the other sections 12 and 13 form ahousing for the lower screen and brush. The upper section 10 forms acover, and the lower section- 13 forms a bottom for the complete casing,while the sections 11 and 12 conduct the material from the upper screento the'lower one. Itis im-' portant that the casing be tight because ofthe extremely light character of the carbon black and the tendency ofthe latter to. move with air currents out through any apertures in thecasing. q

Supported between the casin sections 12 having a pe- The upper edge ofthe wall 14. may be provlded with any suitable form of support as for.instanceangle irons16 having outwardly extending flanges adapted torest upon the members 17 of the main frame The casing section 12 mayhave a somewhat similar angle iron support '18 which may rest upon theangle irons 16'of the screen p"an,-with' o0 suitable gasket: stripsabove and below the outwardly extending flanges of the latter.

, Thus a substantially-air-tight joint is formed between the two casingsections. One of the two casing sectlons is vertically movable inrespect tothe other to permit the removal the line 5 5 or Fig.

has a flexible wall portion 19 whereby the lower part may be raised inrespect to the casing section 11, The casing section 12 may havebrackets 20 vertically slidable upon guide rods 21 forming a portionofthe main rame.

able means may be employed. As illustrated particularly in Figs. 2 and3, the ends of the casing section 12 are connected by links 22 to alever 23. One end of the lever 23'is suspended from theframe by links24:, while the opposite end may be raised or lowered to raise or lowerthe casing section 12. When in raised position it may be held by a hook25 or any other suitable form of retainer.

The two levers 23 at opposite ends of the casing section may beconnected together by a transverse rod 26 to. insure simultaneous actionof both ends of the casing section, and form a handle. I I i Forcooperation with the screen 15 there ,of the screen pan. As shown, thesection 12 I For raising the casing section 12 any suitis provided abrush mechanism which includes' a series of brushes 27 extendingtransversely of the screen, and each of a length substantially equal tothe width of-thelatter. I The brushes are attached to a frame mechanismincludinga pair of longitudinally extending members 28 connected bycrossmembers 29, the latter being supported by guides 30 attached atopposite ends to the casng section 12. Each brush is vertically movablein respect to the brush operating frame, whereby the bristles of thebrush do not need to support the frame. As shown, each brush back has apair of pins 31 ver-' tically slidable in the frame'members 28 and helddown by very light springs 32.

For reciprocating the brush-mechanism there is provided a recipro'catoryrod 33 wh ch is connected to the brush frame in any suitable manner,as-for instance by a clamp.- ing'mechani'sm 34. shown in Fig. 5, andthis rod extends through a stufling box-35 in one end wall of the casingsection 12." By reciprocating this rod the brushesmay be given acomparatively short back and forth movement'and have a light sweepingaction on the screen. The range through which the parts are reciprocated.is preferably but slightly greater than thedistance between ad acentbrushes. The screen is of very fine mesh, the lower one being preferablyof about 80 mesh, and is supported so as to prevent sagging' and to holditin the proper plane forjuniform action thereon by the brushes. Asshown, the wall 14 of the screen pan has a series of; longitudinal andtransverse braces 3fi beneath the screen and en- -gagin'g with the underside of'the latter.

a As the brush frame is carried by the guides 30 which are attached'tothe casing. section 1 12, it will be obvious that when thelatter is araised by lifting the handle 26, the brushes c Ll Fig. 3.

will be lifted to a correspondin extent and to a position considerablyabove t e upper edge of the screen pan. This permits the screen pan tobe raised out of the casing sect-ion 1 3 and remoyed for cleaning. Anysuitable mechanism may be provided for raislng and removing the screenpan. As shown, the pan at each end is pivot-ally connected to a slide 737 mounted upon a transversely extending rod 38. Each rod has one end 39pivoted to the frame so that upon raising theopposite end the screen panis lifted out of the casing section 13. While the rods 38 are held inraised position, the slide 37 maybe moved along the rods to'carry thescreen pan to a position outside "of the casing, as shown in The screenmay then be tilted about its pivotal connection to the slides 37 so asto dump out any grit particles which have accumulated therein.

The upper casing sect'on 10 is vertically movable in the same waya's'the casing section 12, and the screen pan and brush mechanismmounted between the casing sections 10 and 11, may be substantiallyidentical with that betweenthe lower casing sections 12 and 13, exceptthat the upper screen may be of slightly coarser mesh, as for instanceabout 50. Also, the lever mechanism and the screen removing mechanismmay be so mounted that one is operated from one side of the machine andthe other from the other e side, although obviously this is notessential'.

taneous operation. a

The material may be delivered to the apparatus in any suitable manner,as for in- I stance through either of a pair of conduits .40, andthesemay be connec ted together As shown, there is an oscillato erably ofhopper sha and thence led to the two casing sections 10 by flexiblecondu't sections 41 which permit the vertical movement of the casinsections 10. Dampers 42/ma be emploge ,atthe upper end of each exiblecon uit section 41, whereby'either. damper may be closed-to send all ofthe mater'al to the .other set of screens while onecasing is beingopened up and the screens thereof cleaned. g

The two lower casing sections 13 'are prefe so that they taperdownwardlyto a con uit 43 which may include a screw conveyor 44 forcontinuously removing the screened or bolted material.

. For reciprocating the brushes there is provided oscillatory mechanismwhich may actuate both the upper andalower brushes.

ry member 45 mounted on" a transverse shaft 46 'journaled in anauxiliary mounted midwa between the planes of the two brushesan' hasupwardly and downwardly extending arms 47 each of which may be connectedby a link 49 to the -cor-" responding brush operating rod 33. The

They maybe connected for simulthe'minimum, and the capacit frame 47.The. shaft 'is:

' connection between each link 49 and its corresponding rod 33 is suchthat the two may be readily .separa raise the brushes and correspondingcasing sections. At the left hand side of Fig. 1 the links are shownconnected to their respective rods, whereas at the right hand side thelinks are disengaged and. shown as merely resting upon the frame] Foroscillating the member 45 the shaft 46 is probya link 51 to an eccentric52 on a drive .shaft 53. For a duplex machine this shaft may extend thefull length ofthe machine, and there may be separate oscillatorymembers, eccentrics, links, etc at opposite ends, one 'set for operatingthe brushes of one casing and the otl er for operatin those of the othercasing/ The sameshaft 53 may. be employed for driving the screw conveyor44, and by any suitable means, as forinstance by sprockets and a chain54.

In the machine above described, it will be noted that the upper casingsection for each brush and pan is raised, while the lower casing sectionis stationary. This is not essential, as the upper casing sections may'be stationary and the brushes held against vertical movement, while thelower casing sections may be mounted to permit of their being droppeddown from the upper casing sections. in such anarrangement the screenpans might be lowered with the casing sections through only a portion ofthe movement of the latter, and after reaching a preted when it isdesired to 'vided with a lever arm which is connected determinedposition below the brushes the casing sections. might continue theirdownward movement to a point below the screen "pans, whereby the'lattermight be moved,

outwardly for dumping.

. In my improved machine I am able to obtain aver heretofore beenobtained in the bolting oi carbon black. The light of thebrushesprevents packing or clogging of the screens and any particlesremaining in'the interstices during a movement of the brush in onedirection are removed during ymuch finer product than has wear and tearon thescreens is reduced to of the apparatus is materially increase dueto the lar er area for the same amount of powder to all through and theaction of the larger number of brushes 1n contact with the material, asdistinguished from apparatus in" sweeping motion 1 10 the returnmovement of the brush. The.

fthe' the latter up'on'the oscillation of the drum.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. A bolter for pulverulent material.including a casing having'upper'. and lower separable sections, ascreen within said casing, a frame above said screen, brushes carried bysaid frame in operative relationship to said screen, means for movingsaid,

frame back and 'forth, guiding means'for I said frame carried by saidupper section, lost .motion connections between said guiding means andsaid frame and permitting rela-. tive 'vertical movement, whereby theweight,

of the brushes is supported by saidscreen, and means for eflecting arelative vertical I movement of said sections to separate them,

said guiding means serving to support said frame and brushes when thecasing sections are separated. 2. A bolter for pulverulent materialincludin a casing having upper and lower separa le sections, a screenwithin the easing, a brush movable back and forth over i said screen,means for efi'ecting, a vertical.

movementmf one section in respect'to the other to separate them, andmeans within the upper section for supporting the brush when the casingsections are separated but permitting the weight of the brush to besupported by the screen when said casing sections are together..

3 3. A shelter forpulverulent material including a casing having upper,and lower sections relatively movable vertically, a screen withinsaid-casing, a series of parallel brushes, means for moving the latterback .and forthover said screen with the weight .of the brushes restingon said screenyand a guide in said upper casing section serving tosupport the brus es only when the casing sections are separa d.

4. A bolter for pulverulent material in cluding a clpsed casing havingupper .and

lower sections relatively movable vertically, a screen pan w thin thelower section, means for separating said sections, and means for liftingsaid pan .out of said lower section,

said means having guiding portions for the horizontal outward movementof. the screen from between said-sections; a

5. A bolter for pulverulent material including a -casin having upper andlower sections, means. or separating said sections, a screen within saidcasing, a guide upon which said screen may be moved substantiallyhorizontally upon separation of the casing sections, and pivotalconnections between said screen and said guide permitting a tiltingmovement of the screen when outside of thecasing.

cluding a casing having a pair of spaced superposed screens therein,said casing hav 6. A bolter for pulverulent material ining a wallsection between said screens, vertically movable and including aflexible portion, and lover mechanism vfor movin sald section verticallyand collapsmgl-sa flexible portionto permit removal of one of saidscreens;

'7. A bolter for pulverulent material including a casing having asubstantially horizontalscreen therein,,a section 0f the wall of saidcasin being vertically movable and having a fle'xi le portion, and meansformoving said section to permit removal of sald screen.

8. bolter for cluding a pair of superposed casin sections,

pulverulent material, in- I a screen'pan disposed within the owerseetionand having a peripheral flange resting upon the upper edge of thelowersection, said upper casing section having a flange resting uponsaid flange of the screen pan,

aseri'es of brushes within said casing and movable over. the uppersurface of the screen v pan, operating means for said brushes,connected'to the upper section of the casing, and means for separatingsaid casin sections to thereby se' arate the brushes an screen pair andpermit the removal of the screen an from the lower section. Signed atWarren, 'inthe county of. Warren, and State of Pennsylvania, this thirdday of December, A. D; 1924.

WILLIAM .s HOSKINSL

